I am trying to sign up for this game but it won't let me use the name Wrex B. Hunter. When I include the . after B it says I can't use an Apostrophe and when I remove the dot it just says nothing except for the character name is not allowed. Why can't I use this name.

I tried just removing the B and having Wrex Hunter as my name but it still says it isn't accepted. I know the first name comes from a character in another universe but it said that you are allowed to use the first name just not the complete name. What could be the reason?

Membership application failed!
The character name you provided does not match our rules requirements. Make sure you are not using any Restricted Names or Titles.
It is highly recommended that you read The Character Creation Rules
Please go [back] to fix it up.

It says the same thing when I try us ing the name Wrex Bounty Hunter. Should I just give up on this name entirely and try and think up a new one?